Work great with bluetooth device, can Answer/Hang up/Reject an incoming through bluetooth

Frequency display screen, more convenient to choose.

The full load power output voltage is approx 5V,the full-load current is 2.1A.

Under the normal use of products, the middle-screen displays the output voltage, current, input voltage alternately.Insert TF card/U disk into the expansion slots, this device will automatically recognize and play MP3/WMA music files stored in them.